<template>
    <div>
        <!-- 面包屑导航区 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>商品分类</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片视图 -->
        <el-card>
            <el-row>
                <el-col>
                    <el-button class="btn" type="primary" @click="addCateDialog">添加分类</el-button>
                </el-col>
                <!-- 表格 -->
                <tree-table :data="cateList" :columns="columns" :selection-type="false" :expand-type="false" show-index
                    index-text="#" border :show-row-hover="false">

                    <template slot="isok" slot-scope="scope">
                        <i class="el-icon-success" v-if="scope.row.cat_deleted === false" style="color: lightgreen"></i>
                        <i class="el-icon-error" v-else style="color: red"></i>
                    </template>

                    <template slot="order" slot-scope="scope">
                        <el-tag v-if="scope.row.cat_level === 0">一级</el-tag>
                        <el-tag type="success" v-else-if="scope.row.cat_level === 1">二级</el-tag>
                        <el-tag type="warning" v-else>三级</el-tag>
                    </template>

                    <template slot="opt">
                        <el-button type="primary" size="mini" icon="el-icon-edit">编辑</el-button>
                        <el-button type="danger" size="mini" icon="el-icon-delete">删除</el-button>
                    </template>
                </tree-table>
                <!-- 分页区 -->
                <el-pagination @size-change="handleSizeChange" @current-change="handleCurrentChange"
                    :current-page="querInfo.pagenum" :page-sizes="[3, 5, 10, 15]" :page-size="querInfo.pagesize"
                    layout="total, sizes, prev, pager, next, jumper" :total="total">
                </el-pagination>
            </el-row>
        </el-card>
        <!-- 添加分类区域 -->
        <el-dialog title="添加分类" :visible.sync="addCateDialogVisible" width="50%" @close="addCateDialogClosed" >
            <el-form :model="addCateForm" :rules="addCateFormRules" ref="addCateFormRef" label-width="100px"
                class="demo-ruleForm">
                <el-form-item label="分类名称：" prop="cat_name">
                    <el-input v-model="addCateForm.cat_name"></el-input>
                </el-form-item>
                <el-form-item label="父级分类：">
                    <el-cascader v-model="selectedKeys" :options="ParentCateList" :props="cascaderProps"
                        @change="parentCateChange" clearable change-on-select>
                    </el-cascader>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="addCateDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addCate">确 定</el-button>
            </span>
            </el-form>
        </el-dialog>
    </div>
</template>

<script>
    export default {
        name: 'Cate',

        data() {
            return {
                // 查询条件
                querInfo: {
                    type: 3,
                    pagenum: 1,
                    pagesize: 5
                },
                // 商品分类数据列表
                cateList: [],
                total: 0,
                // 为table指定列的定义
                columns: [
                    {
                        label: '分类名称',
                        prop: 'cat_name'
                    },
                    {
                        label: '是否有效',
                        type: 'template',
                        template: 'isok'
                    },
                    {
                        label: '排序',
                        type: 'template',
                        template: 'order'
                    },
                    {
                        label: '操作',
                        type: 'template',
                        template: 'opt'
                    }
                ],
                addCateDialogVisible: false,
                addCateForm: {
                    cat_name: '',
                    cat_pid: 0,
                    cat_level: 0
                },
                addCateFormRules: {
                    cat_name: [
                        { required: true, message: '请输入分类名称', trigger: 'blur' }
                    ]
                },
                ParentCateList: [],
                cascaderProps:{
                    expandTrigger: 'hover',
                    value: 'cat_id',
                    label: 'cat_name',
                    children: 'children'
                },
                selectedKeys: [],
            };
        },

        created() {
            this.getCateList()
        },

        mounted() {

        },

        methods: {
            // 获取商品分类数据
            async getCateList() {
                const { data: res } = await this.$http.get('categories', { params: this.querInfo })
                if (res.meta.status !== 200) {
                    return this.$message.error('获取分类列表失败')
                }
                this.cateList = res.data.result
                this.total = res.data.total
            },
            // 监听pagesize的改变
            handleSizeChange(newSize) {
                this.querInfo.pagesize = newSize
                this.getCateList()
            },
            handleCurrentChange(newPage) {
                this.querInfo.pagenum = newPage
                this.getCateList()
            },
            addCateDialog() {
                this.getParentCateList()
                this.addCateDialogVisible = true
            },
            async getParentCateList() {
                const { data: res } = await this.$http.get('categories', {
                    params: { type: 2 }
                })
                if (res.meta.status !== 200) {
                    this.$message.error('获取父级权限数据失败')
                }
                console.log(res.data);
                this.ParentCateList = res.data
            },
            parentCateChange() {
                if(this.selectedKeys.length > 0 ) {
                    this.addCateForm.cat_pid = this.selectedKeys[this.selectedKeys.length-1]
                    this.addCateForm.cat_level = this.selectedKeys.length
                    return
                } else {
                    this.addCateForm.cat_pid = 0
                    this.addCateForm.cat_level = 0
                }
            },
            addCateDialogClosed(){
                this.$refs.addCateFormRef.resetFields()
                this.selectedKeys = []
                this.addCateForm.cat_level = 0
                this.addCateForm.cat_pid = 0
            },
            addCate(){
                this.$refs.addCateFormRef.validate(async valid => {
                    if(!valid) return
                    const {data:res} = await this.$http.post('categories',this.addCateForm)

                    if(res.meta.status !== 201) {
                        return this.$message.error('添加分类失败')
                    }
                    this.$message.success('添加分类成功')
                    this.getCateList()

                    this.addCateDialogVisible = false
                })
            }
        },
    };
</script>

<style lang="css" scoped>
    .btn {
        margin-bottom: 15px;
    }
    .el-cascader {
        width: 100%;
    }
</style>